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Computational Offloading or Data Binding? Bridging the Cloud Infrastructure to the Proximity of the Mobile User

Computational Offloading or Data Binding? Bridging the Cloud...

引用

IEEE International Conference on Mobile Cloud Computing, Services, and Engineering

作者： Huber Flores Satish Narayana Srirama Rajkumar Buyya University of Tartu Institute of Computer Science Mobile Cloud Lab University of Melbourne Department of Computing and Information Systems Cloud Computing and Distributed Systems Laboratory (CLOUDS)

ISBN: (纸本)9781479944248

Mobile and cloud computing are converging as the prominent technologies that are leading the change to the post personal computing (PC) era. Computational offloading and data binding are the core techniques that foster to elastically augment the capabilities of low-power devices, such as smartphones. Mobile applications may be bonded to cloud resources by following a task delegation or code offloading criteria. In a delegation model, a handset can utilize the cloud in a service-oriented manner to delegate asynchronously a resource-intensive mobile task by direct invocation of the service. In contrast, in an offloading model, a mobile application is partitioned and analyzed so that the most computational expensive operations at code level can be identified and offloaded to a remote cloud-based surrogate. We compared in this paper, the mobile cloud computing models for offloading and delegation. We utilized our own frameworks for computational offloading and data binding in the analysis. While in principle, offloading and delegation are viable methods to augment the capabilities of the mobile devices with cloud power, they enrich the mobile applications from different perspectives at diverse computational scales.

关键词： Mobile Cloud Computing Access Models Code Offloading Task Delegation Middleware Mobile Crowdsourcing

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ChaosFIRE: An experiment with chaoster, the context-aware collaboration platform for crisis/chaos management

ChaosFIRE: An experiment with chaoster, the context-aware co...

引用

IEEE Annual Conference on Pervasive Computing and Communications Workshops (PerCom)

作者： László Kovács Balázs E. Pataki MTA SZTAKI DSD Department of Distributed Systems Institute for Computer Science and Control Hungarian Academy of Sciences Budapest Hungary

Summary form only given. ChaosFIRE is an experiment project to evaluate the performance and usability of peer-to-peer mobile technologies as an alternative mean to central service based solutions to collect and distribute sensor information in an urban area. The Project runs under the 1st Open Call of Fed4FIRE IP under FP7 and is based on the technology developed in the Chaoster project of MTA SZTAKI DSD. Chaoster is a DTN-PSN (Delay Tolerant Networking - Pocket Switched Network) based adaptive, context-aware collaboration platform supporting emergent interoperability for crisis/chaos management. DTN-PSN communication layer of Chaoster is used in this experiment together with the ChaosONE simulator, for the evaluation of DTN communication protocols. This talk will present the Chaoster platform, the target use cases of the solution and the aims and results of the ChaosFIRE experiment.

关键词： Chaotic communication Collaboration computer science Peer-to-peer computing Mobile communication Interoperability

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Privacy-Aware Large-Scale Virological and Epidemiological Data Monitoring

Privacy-Aware Large-Scale Virological and Epidemiological Da...

引用

Annual IEEE Symposium on computer-Based Medical systems

作者： Constantinos Patsakis Michael Clear Paul Laird Athanasios Zigomitros Mélanie Bouroche Distributed Systems Group School of Computer Science and Statistics Dublin Ireland Greece & Department of Informatics University of Piraeus Greece

Modern mobile and wearable devices are enabling the realization of so-called ubiquitous computing. This provides citizens the technological means to contribute to urban management by becoming sensors within a smart city. Notwithstanding, the health sector is a very crucial factor for city management, imposing restrictions to the decisions directly or indirectly. The question that arises is given the current technological advances, could we collect health related data from citizens without violating their privacy? In this work we propose a methodology that can be used to allow citizens to send their data without disclosing their identity, while simultaneously enabling almost real-time urban-scale virological and epidemiological data monitoring.

关键词： Protocols Monitoring Smart phones Privacy Real-time systems Sensors Cities and towns

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Replication-Based Fault-Tolerance for Large-Scale Graph Processing

Replication-Based Fault-Tolerance for Large-Scale Graph Proc...

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International Conference on Dependable systems and Networks (DSN)

作者： Peng Wang Kaiyuan Zhang Rong Chen Haibo Chen Haibing Guan Shanghai Key Laboratory of Scalable Computing and Systems Institute of Parallel and Distributed Systems Shanghai Jiao Tong University Department of Computer Science Shanghai Jiao Tong University

The increasing algorithm complexity and dataset sizes necessitate the use of networked machines for many graph-parallel algorithms, which also makes fault tolerance a must due to the increasing scale of machines. Unfortunately, existing large-scale graph-parallel systems usually adopt a distributed checkpoint mechanism for fault tolerance, which incurs not only notable performance overhead but also lengthy recovery time. This paper observes that the vertex replicas created for distributed graph computation can be naturally extended for fast in-memory recovery of graph states. This paper proposes Imitator, a new fault tolerance mechanism, that supports cheaply maintenance of vertex states by replicating vertex states to their replicas during normal message exchanges, and provides fast in-memory reconstruction of failed vertices from replicas in other machines. Imitator has been implemented by extending Hama, a popular open-source clone of Pregel. Evaluation shows that Imitator incurs negligible performance overhead (less than 5% for all cases) and can recover from failures of more than one million of vertices with less than 3.4 seconds.

关键词： Fault tolerance Fault tolerant systems computer crashes Checkpointing Synchronization Clustering algorithms Computational modeling

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Data Avenue: Remote Storage Resource Management in WS-PGRADE/gUSE

Data Avenue: Remote Storage Resource Management in WS-PGRADE...

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International Workshop on science Gateways (IWSG)

作者： Ákos Hajnal Zoltán Farkas Péter Kacsuk Laboratory of Parallel and Distributed Systems Hungarian Academy of Sciences Budapest Hungary Computer Science and Software Engineering Department University of Westminster London United Kingdom

State-of-the-art gateways are connected to several distributed computing infrastructures (DCIs) and are able to run jobs and workflows simultaneously in all those different DCIs. However, the flexibility of accessing data storages belonging to different DCIs is a missing feature of current gateways. SZTAKI (Institute for computer science and Control) has developed a Data Avenue Blacktop service and aLiferay-based Data Avenue port let that open the door for integrating such features into science gateways. The paper explains the design considerations of the Data Avenue Blacktop service and its usage scenarios in science gateways through the Data Avenue port let.

关键词： Conferences Logic gates

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Formal model of certificate omission schemes in VANET

Formal model of certificate omission schemes in VANET

引用

IEEE Vehicular Networking Conference (VNC)

作者： Michael Feiri Jonathan Petit Frank Kargl Services Cybersecurity and Safety University of Twente The Netherlands Department of Computer Science University College Cork Ireland Institute of Distributed Systems University of Ulm Germany

The benefits of certificate omission schemes in VANET have been so far proven by simulation. However, the research community is lacking of a formal model that would allow implementers and policy makers to select the optimal parameters for such schemes. In this paper, we lay the foundations of the formal model for certificate omission schemes in VANET. We apply the model to `No Omission' and `Periodic Omission', which validates the previous simulation and formulates the optimal parameters for these schemes.

关键词： Communication channels Vehicles Vehicular ad hoc networks Conferences Packet loss Receivers

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Compact and efficient agent messaging

Compact and efficient agent messaging

引用

10th International Workshop on Programming Multi-Agent systems, ProMAS 2012

作者： Jander, Kai Lamersdorf, Winfried Distributed Systems and Information Systems Computer Science Department University of Hamburg Germany

ISBN: (纸本)9783642386992

Messages are considered to be a primary means of communication between agents in multi-agent systems. Since multi-agent systems are used for a wide variety of applications, it also includes applications like simulation and calculation of computer generated graphics which need to employ a large number of messages or very large messages. In addition, another set of applications target hardware which is resource constrained in either bandwidth or processing capacity. As a result, these applications have different requirements regarding their messages than other agent message formats. This paper proposes useful properties of agent messages and evaluates them with regard to different types of applications. Based on this evaluation a message format for Jadex called Jadex Binary is proposed which emphasizes properties which are not traditionally the focus of agent message formats and compare it to well-known formats based on those properties. © 2013 Springer-Verlag.

关键词： Multi agent systems

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Delegation-based authentication and authorization for the IP-based Internet of Things

Delegation-based authentication and authorization for the IP...

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IEEE Communications Society Conference on Sensor and Ad Hoc Communications and Networks (SECON)

作者： René Hummen Hossein Shafagh Shahid Raza Thiemo Voig Klaus Wehrle Communication and Distributed Systems RWTH Aachen University Germany Department of Computer Science ETH Zurich Switzerland SICS Swedish ICT Kista Sweden Uppsala Universitet Uppsala SE

IP technology for resource-constrained devices enables transparent end-to-end connections between a vast variety of devices and services in the Internet of Things (IoT). To protect these connections, several variants of traditional IP security protocols have recently been proposed for standardization, most notably the DTLS protocol. In this paper, we identify significant resource requirements for the DTLS handshake when employing public-key cryptography for peer authentication and key agreement purposes. These overheads particularly hamper secure communication for memory-constrained devices. To alleviate these limitations, we propose a delegation architecture that offloads the expensive DTLS connection establishment to a delegation server. By handing over the established security context to the constrained device, our delegation architecture significantly reduces the resource requirements of DTLS-protected communication for constrained devices. Additionally, our delegation architecture naturally provides authorization functionality when leveraging the central role of the delegation server in the initial connection establishment. Hence, in this paper, we present a comprehensive, yet compact solution for authentication, authorization, and secure data transmission in the IP-based IoT. The evaluation results show that compared to a public-key-based DTLS handshake our delegation architecture reduces the memory overhead by 64 %, computations by 97 %, network transmissions by 68 %.

关键词： Servers Protocols Context Random access memory Public key cryptography

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Simulation and Big Data: A Way to Discover Unusual Knowledge in Emergency departments: Work-in-Progress Paper

Simulation and Big Data: A Way to Discover Unusual Knowledge...

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International Conference on Future Internet of Things and Cloud (FiCloud)

作者： Eva Bruballa Manel Taboada Eduardo Cabrera Dolores Rexachs Emilio Luque Tomàs Cerdà Computer Science School Universitat Autònoma de Barcelona (UAB) Barcelona Spain Computer Architecture and Operating Systems Department Universitat Autònoma de Barcelona (UAB) Barcelona Spain

Here a work in progress is reported on within research that aims to obtain knowledge about variables which may influence a hospital emergency department's performance and quality of service. Knowledge discovery will be achieved through the analysis of intensive data generated by the simulation of any possible scenario in the real system. The challenge is to provide knowledge of critical, non-usual or extreme situations. Simulation is the only way to obtain information about these kinds of situations, as it is not possible to test such scenarios in the real system. We show how simulation of the real system through advanced computing is a source of big data, as it allows rapid and massive data generation. The potential of high performance computing makes it possible to generate a very large amount of data within a reasonable time, store this data, then process and analyze it to obtain knowledge. We describe the methodology proposed for this goal, which is based on the use of the simulator as a sensor of the real system, and so as the main source of data. The application of data mining techniques will open the doors to knowledge. To verify that the proposed methodology works, we propose a case study in which the aim is to obtain knowledge from a set of data already available, obtained from the simulation of a reduced set of scenarios of the real system.

关键词： Data models Data mining Computational modeling Hospitals Analytical models Big data

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The Role of Inference in the Anonymization of Medical Records

The Role of Inference in the Anonymization of Medical Record...

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Annual IEEE Symposium on computer-Based Medical systems

作者： Athanasios Zigomitros Agusti Solanas Constantinos Patsakis Department of Informatics University of Piraeus Greece Smart Health Research Group Universitat Rovira i Virgili Tarragona Spain Distributed Systems Group School of Computer Science and Statistics Dublin Ireland

The quality of life has been significantly improved and one of the main reasons is the medical advances of the past decades. Nevertheless, to further advance the research and services in the field, practitioners, researchers and health organizations should share more information. While this need is indisputable, the sensitivity of the information demands that it is preprocessed, so that the published data are anonym zed and individuals cannot be identified. The scope of this work is to highlight the difficulties in providing automated anonymization approaches for medical records without consulting experts in the field. One of the major problems that is going to be highlighted is that Quasi-Identifiers (QI) are not independent. It is well known that combinations of QIs can be used to infer other relevant information. Nevertheless, this work tries to exploit the other way of information flow, we show how sensitive attributes can be exploited to derive information about the QIs, leading to many privacy hazards for the patients whose records are shared. To this extent, we illustrate some relevant examples and discuss probable counter-measures.

关键词： Diseases Cancer Heart Stomach Privacy Databases Lattices

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